René J.V. Bertin posted on Sat, 12 May 2018 10:44:34 +0200 as excerpted:
> Hi,
>
> I have a Konsole tab that shows syslog output (e.g. when I dis/connect
a USB device) and now also output that appears to be from helper KF5 apps
(launched by kded5?), for instance
>
> org.kde.kwindowsystem: Loaded plugin "/opt/local/share/qt5/plugins/kf5/
org.kde.kwindowsystem.platforms/KF5WindowSystemX11Plugin.so" for platform
"xcb"
> Connecting to deprecated signal
QDBusConnectionInterface::serviceOwnerChanged(QString,QString,QString)
>
>
> I'm not complaining about it, but I have often wondered why this
happens, and why it's always the same tab (which isn't even the 1st
Konsole tab that gets opened; it currently has `tty`==/dev/pts/2). I
don't see any other application that uses the same device as its standard
output.
>
> Anyone got the explanation?
I've half an explanation, hopefully enough to point you in the right
direction for more. But I've never had to bother too much with it myself
so am fuzzy on the detail, and am too tired to make sense of anything I
did try to read (or look up in my own config), let alone explain once I
did, ATM, anyway. But hopefully it'll at least be enough to check a bit
of your own config and provide a start for a google, if necessary.
There's the notion of a "system console" that gets various higher
priority kernel log messages, and a similar "console log" setting for
most syslog daemons including systemd's journald. These are normally
routed to a text terminal, termed the "system conosle", but they can be
routed to a pseudoterm device like that utilized by text terminals such
as konsole, as well. Additionally, there are X-based utilities that will
display them in an X-window as well.
Presumably you have one or more of these configured to point to the pts
(or similar) device behind that konsole tab, and will need to figure out
what's configured that way and point it elsewhere if you want to change
it.
Meanwhile, sometimes I have these messages (the kernel level ones, not
general syslog) overwriting my CLI login sessions and would like to point
them elsewhere so they quit getting in the way, but the irritation has
never been enough to actually go researching further myself (I just
grumble and hit refresh if need be), so if you happen to find a helpful
article on the topic, please post a link. That might be the perfect
"round tuit" that I never seem to get, otherwise. =:^)
--
Duncan - List replies preferred. No HTML msgs.
"Every nonfree program has a lord, a master --
and if you use the program, he is your master." Richard Stallman